I need to implement ssl communication with a server. I need to exchange some data on a specific port. They supplied me with .pem file.
I'm not sure how to use the package to use the .pem file and establish connection to exchange data.
Does anyone have any sample on this?
I looked at the samples that come with this library, but couldn't find anything what to do with .pem files.
Thanks.

The Security Library only supports extracting public certificates (and not their private keys) from a PEM file (look at the Certificate.CreateFromPemFile method for details).

However, in your case you also need to access the private parts of the PEM file. You'll have to convert the certificate to a type that the CryptoAPI can handle, as described in http://www.mentalis.org/forum/thread.qpx/62